Best to find a gunsmith and ask for help
You need a gunsmith
You can get a manual for free at Ruger's website.
Best left to a gunsmith
how do you disassemble a model 49 ithaca 22 rifle
Best to ask a gunsmith for help
Best to let a gunsmith show you how.
To disassemble a Hi-Point .40 Cal JCP model, first ensure the firearm is unloaded. Next, remove the magazine and retract the slide to check that the chamber is clear. Then, locate and push down the takedown pin on the left side of the frame, pull the slide back slightly, and lift it off the frame. Finally, you can remove the recoil spring and barrel for further disassembly or cleaning.
You need the services of a gunsmith
Best left to a gunsmith
If you don't have a manual, get help from a gunsmith
If you don't have an owner's manual, find a gunsmith and ask for help
Your best bet is to go to a gunsmith.